From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Jamie Bainbridge <jamie.bainbridge@gmail.com>,
Eric Dumazet <edumazet@google.com>,
"David S . Miller" <davem@davemloft.net>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
David Ahern <dsahern@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Chris Down <chris@chrisdown.name>,
Stephen Hemminger <stephen@networkplumber.org>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH net-next] tcp: Fix tcp_syn_flood_action() if CONFIG_IPV6=n
Date: Tue, 15 Nov 2022 11:12:16 +0100 [thread overview]
Message-ID: <d1ecf500f07e063d4e8e34f4045ddca55416c686.1668507036.git.geert+renesas@glider.be> (raw)
If CONFIG_IPV6=n:
net/ipv4/tcp_input.c: In function ‘tcp_syn_flood_action’:
include/net/sock.h:387:37: error: ‘const struct sock_common’ has no member named ‘skc_v6_rcv_saddr’; did you mean ‘skc_rcv_saddr’?
387 | #define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
| ^~~~~~~~~~~~~~~~
include/linux/printk.h:429:19: note: in definition of macro ‘printk_index_wrap’
429 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
include/linux/printk.h:530:2: note: in expansion of macro ‘printk’
530 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
include/linux/net.h:272:3: note: in expansion of macro ‘pr_info’
272 | function(__VA_ARGS__); \
| ^~~~~~~~
include/linux/net.h:288:2: note: in expansion of macro ‘net_ratelimited_function’
288 | net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/net.h:288:43: note: in expansion of macro ‘sk_v6_rcv_saddr’
288 | net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~
net/ipv4/tcp_input.c:6847:4: note: in expansion of macro ‘net_info_ratelimited’
6847 | net_info_ratelimited("%s: Possible SYN flooding on port [%pI6c]:%u. %s.\n",
| ^~~~~~~~~~~~~~~~~~~~
Fix this by using "#if" instead of "if", like is done for all other
checks for CONFIG_IPV6.
Fixes: d9282e48c6088105 ("tcp: Add listening address to SYN flood message")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
net/ipv4/tcp_input.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 94024fdc2da1b28a..e5d7a33fac6666bb 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -6843,11 +6843,14 @@ static bool tcp_syn_flood_action(const struct sock *sk, const char *proto)
if (!queue->synflood_warned && syncookies != 2 &&
xchg(&queue->synflood_warned, 1) == 0) {
- if (IS_ENABLED(CONFIG_IPV6) && sk->sk_family == AF_INET6) {
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6) {
net_info_ratelimited("%s: Possible SYN flooding on port [%pI6c]:%u. %s.\n",
proto, &sk->sk_v6_rcv_saddr,
sk->sk_num, msg);
- } else {
+ } else
+#endif
+ {
net_info_ratelimited("%s: Possible SYN flooding on port %pI4:%u. %s.\n",
proto, &sk->sk_rcv_saddr,
sk->sk_num, msg);
--
2.25.1
next reply other threads:[~2022-11-15 10:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-15 10:12 Geert Uytterhoeven [this message]
2022-11-15 11:37 ` [PATCH net-next] tcp: Fix tcp_syn_flood_action() if CONFIG_IPV6=n Matthieu Baerts
2022-11-16 20:31 ` Jakub Kicinski
2022-11-16 21:39 ` Jamie Bainbridge
2022-11-16 22:15 ` Jakub Kicinski
2022-11-18 1:45 ` Jamie Bainbridge
2022-11-18 8:29 ` Geert Uytterhoeven
2022-11-18 16:19 ` Jakub Kicinski
2022-11-21 22:44 ` Saeed Mahameed
2022-11-22 3:52 ` Jakub Kicinski
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